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@ARTICLE{Rtting:1031975,
      author       = {Hofmann, Diana and Pütz, Thomas and Konrad-Schmolke,
                      Matthias and Bol, Roland},
      collaboration = {Rütting, Louise},
      title        = {{S}pruce and pine utilization of phosphorus in soil amended
                      with 33 {P} ‐labelled hydroxylapatite},
      journal      = {European journal of soil science},
      volume       = {75},
      number       = {5},
      issn         = {0022-4588},
      address      = {Oxford [u.a.]},
      publisher    = {Wiley-Blackwell},
      reportid     = {FZJ-2024-05899},
      pages        = {e13587},
      year         = {2024},
      abstract     = {Mined rock phosphate is expected to become a scarce
                      resource within the next few decades as global phosphorus
                      (P) deposits are declining. As a result, mineral P
                      fertilizer will be less available and more expensive.
                      Therefore, improved knowledge is needed on other P
                      resources, for example, apatite fertilizers derived from the
                      by-products of iron mining. Forestry is a potential future
                      consumer of apatite-rich products with the aim of obtaining
                      more wood per hectare. The actual P availability in apatite
                      to plants has so far been barely quantified. We therefore
                      examined tree P uptake using 33P apatite under chamber-grown
                      and outdoor conditions. We examined the P uptake for the two
                      main conifer species spruce (Picea abies) and pine (Pinus
                      sylvestris) used in Fenno-Scandinavian forestry. We
                      synthesized 33P-enriched apatite and applied it to mesocosms
                      with growing seedlings of spruce and pine. The P uptake from
                      33P-labelled hydroxylapatite was subsequently traced by
                      (bio)imaging of radioactivity in the plants and by liquid
                      scintillation counting (LSC) upon destructive harvest in all
                      plant fractions (leaves, stem and roots) and rhizosphere
                      soil. Two climatic conditions were compared, one at natural
                      outdoor conditions and one set as 5°C warmer than the
                      climate record from the previous years. Plant P uptake from
                      33P-labelled hydroxylapatite was enhanced in chamber-grown
                      compared with outdoor seedlings for both tree species. This
                      uptake was manifested in the clear radioactive images
                      obtained over ca. 1 month after soil apatite application.
                      Furthermore, all aboveground plant fractions of both spruce
                      and pine seedlings showed a higher P uptake in warmer than
                      colder daytime environments. The observed quantities and
                      rates of P uptake from 33P-labelled hydroxylapatite by
                      spruce (18 Bq g−1 hour−1) and pine
                      (83 Bq g−1 hour−1; averages in chamber condition)
                      are as to our knowledge unique observations. Natural forest
                      soils in Sweden are often P-poor. Our research suggests that
                      apatite-based P fertilization of spruce and pine forests can
                      increase wood production by overcoming any existing P
                      limitation.},
      cin          = {IBG-3},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {2173 - Agro-biogeosystems: controls, feedbacks and impact
                      (POF4-217)},
      pid          = {G:(DE-HGF)POF4-2173},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001337297400001},
      doi          = {10.1111/ejss.13587},
      url          = {https://juser.fz-juelich.de/record/1031975},
}